Leo
9560485937
對應 arcrun.md 三-A P1 #3。
緣由：cron 零件存在但只做 expression validation，沒有真正的排程跑。leo 指出
「邊用 arcrun 邊修，不要 workaround」— 撤回前一輪的 /mira/wiki-from-raw
mira-specific route（違反 mira CLAUDE.md §1.5 一律 arcrun-native），改補
真正的 cron infra。
加入：
- src/lib/cron-match.ts — 5 欄位 cron matcher（* / N / */N / a-b / a,b 組合）
- src/scheduled.ts — handler：掃 KV cron-idx: prefix，比對 controller.scheduledTime
→ executeWebhookGraph 背景跑
- routes/webhooks-named.ts — acr push 時偵測首節點 cron → 存 cron_expr 到 record
+ 額外寫 cron-idx:{api_key}:{name} 輕量索引；DELETE 一併清理
- src/index.ts — export default 改 { fetch, scheduled }
- wrangler.toml — [triggers] crons = ["* * * * *"]（每分鐘 tick）
- wrangler.toml — workers_dev = true 供 self-fetch self-trigger 用
- tests/arcrun-test/cron_heartbeat.yaml — 健康監控 workflow（每分鐘 fire + set 節點）
撤回：
- 刪 src/routes/mira.ts（mira-specific workaround）
- types.ts 拿掉 MIRA_CONFIG
- index.ts 拿掉 miraRouter wire
- landing/app/mira/feed/page.tsx 拿掉 triggerWikiSynthesis 呼叫
下一輪：mira_feed_watcher.yaml（mira side），可能要先補 kbdb_get filter +
CALLS_SUBFLOW wire（arcrun.md 列為跟進）。
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